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The effect of varying abrasion pressure and nanographene on two body abrasive wear behavior of Glass – Epoxy (GE) composites under multipass condition was studied. These composites: Epoxy (EP), Glass –Epoxy (GE), GE/1 wt% nanographene (GE1) and GE/2 wt% nanographene (GE2) were developed using autoclave molding. The experimentation has been carried out by varying the abrasion load of 2.5, 5, 7.5 and 10 N under the influence of 180 Grit SiC abrasives through an abrading velocity of 0.5 m/s as per ASTM G99 method. It is observed that the wear volume loss of these composites is a linear function of abrasion load and their composition. Further, inclusion of 1 wt% nanographene showed better abrasion wear resistance than higher loading of the same nano filler. This may be due to the structural integrity of Glass Epoxy composites. Higher loading of nanographene localized the stress concentration which leads to poor tribological response. Further, hardness, good mechanical properties and improved degree of crystallanity made the GE1 composites to exhibit good abrasion wear behavior. The frictional study suggested that coefficient of friction (COF) decreases initially as an effect of adding nanographene under lower pressure whereas the reverse action has been exhibited by the composites under the influence of higher pressure. The morphology of the abrasion worn surface was studied using SEM images. It was found that microcuttng, microploughing and fatigue were some of the mechanisms responsible for the failure. |
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